Narrow gauge (two feet) railroad is described in a 27-page article published in 1879 by the Railroad Gazette, a predecessor of the Simmons-Boardman Publishing Co. Reprinted for the Railroadians of America as Book No. 4 in August 1950 with pages 20 x 27.5 cm. Donated by Steve Kehoe to the Middlesex Canal Museum for inclusion in its Billerica and Bedford RR exhibit in memory of his father.